Multi-stimuli responsive metal-organic gel of benzimidazol-based ligands with lead nitrate and their use in removal of dyes from waste-water  

作　　者：Hong Yao Xing-Mei You Qin Lin Jun-Jian Li Ying Guo Tai-Bao Wei You-Ming Zhang 

机构地区：[1]Key Laboratory of Eco-Environment-Related Polymer Materials,Ministry of Education,Key Laboratory of Polymer Materials of Gansu Province,College of Chemistry and Chemical Engineering,Northwest Normal University

出　　处：《Chinese Chemical Letters》2013年第8期703-706,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21064006,21161018 and 21262032);the Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China(No.IRT1177);the Natural Science Foundation of Gansu Province(No. 1010RJZA018);the Youth Foundation of Gansu Province(No.1208RJYA048);NWNU-LKQN-11-32

摘　　要：A novel smart metal-organic gel（MOG） formed from biscarboxyl-functionalized benzimidazole derivative（D11） in the presence of lead nitrate has been investigated.The critical gel concentration for the formation of MOG was just 0.36 wt%,which exhibits a super gelation capability of D11.The coordination of the metal to the ligand D11 was found to play a vital role in the construction of the supramolecular MOG.Microstructures determined by SEM observation demonstrated that the MOG was formed by intertwined fibrils.Interestingly,the MOG exhibits pH-induced,thermo-induced,and chemical-induced reversible gel-sol transition.Meanwhile,this supramolecular MOG shows desirable absorption ability of methyl orange dye molecules in aqueous solution.A novel smart metal-organic gel（MOG） formed from biscarboxyl-functionalized benzimidazole derivative（D11） in the presence of lead nitrate has been investigated.The critical gel concentration for the formation of MOG was just 0.36 wt%,which exhibits a super gelation capability of D11.The coordination of the metal to the ligand D11 was found to play a vital role in the construction of the supramolecular MOG.Microstructures determined by SEM observation demonstrated that the MOG was formed by intertwined fibrils.Interestingly,the MOG exhibits pH-induced,thermo-induced,and chemical-induced reversible gel-sol transition.Meanwhile,this supramolecular MOG shows desirable absorption ability of methyl orange dye molecules in aqueous solution.

关 键 词：Metal-organic gel Benzimidazole derivative Multi-stimuli responsive Dye absorption 

分 类 号：X703[环境科学与工程—环境工程]